All Stars on the Main Sequence

question 62

Multiple Choice

All stars on the main sequence

• A) are at a late stage of evolution after the red-giant stage.
• B) are changing slowly in size by gravitational contraction.
• C) generate energy by hydrogen fusion in their centers.
• D) have approximately the same age to within a few million years.

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Definitions:

Diminished

Reduced or lessened in size, importance, or intensity.

Crepitus

A crackling or popping sound or sensation experienced under the skin and joints or in the lungs, often indicating the presence of air in abnormal places or friction between bone and cartilage.

Tactile Fremitus

A clinical examination method involving the vibration of the chest wall that is palpable on physical examination, often indicating the presence of lung disease or consolidation.

Chest Tube

A medical device inserted into the pleural space of the chest to remove air, fluid, or pus, commonly used in cases of pneumothorax or pleural effusion.